Studies on combined hot-air and microwave vacuum drying of Lithi pulp

Author

Yihui, Chen ; Hui, Li ; Lin Hetong ; Shaoqing, Wang ; Fang, Yuan ; Yifen, Lin

Author_Institution

Coll. of Food Sci., Fujian Agric. & Forestry Univ., Fuzhou, China

fYear

2011

fDate

27-29 May 2011

Firstpage

793

Lastpage

796

Abstract

Orthogonal test was carried out to investigate the effects of hot air temperature, conversed moisture content, microwave intensity and pulse ratio on the L value of the dried litchi pulp, specific energy consumption and sensory score respectively. The results showed that the optimum conditions for drying of litchi pulp by hot air and vacuum microwave combination were found to be hot air temperature 80°C conversed moisture content 50%, microwave intensity 20 W/g and pulsed ratio (10s:40s). The optimized combination drying process reduced specific energy consumption by approximately 50% as compared with conventional hot air drying, and under such conditions, the quality of dried litchi pulp was better than hot air drying or microwave vacuum drying.

Keywords

agricultural products; drying; energy consumption; food products; conversed moisture content; hot air temperature; litchi pulp drying; microwave intensity; microwave vacuum drying; orthogonal test; pulse ratio; sensory score; specific energy consumption; temperature 80 C; Electromagnetic heating; Energy consumption; Materials; Microwave FETs; Temperature sensors; combination drying; hot air drying; litchi pulp; microwave-vacuum drying; parameter optimization;

fLanguage

English

Publisher

ieee

Conference_Titel

New Technology of Agricultural Engineering (ICAE), 2011 International Conference on

Conference_Location

Zibo

Print_ISBN

978-1-4244-9574-0

Type

conf

DOI

10.1109/ICAE.2011.5943911

Filename

5943911